CN210217848U - Device for steam-free operation of low-pressure cylinder of heat supply unit - Google Patents
Device for steam-free operation of low-pressure cylinder of heat supply unit Download PDFInfo
- Publication number
- CN210217848U CN210217848U CN201920288185.9U CN201920288185U CN210217848U CN 210217848 U CN210217848 U CN 210217848U CN 201920288185 U CN201920288185 U CN 201920288185U CN 210217848 U CN210217848 U CN 210217848U
- Authority
- CN
- China
- Prior art keywords
- pressure cylinder
- low
- steam
- low pressure
- heat supply
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The utility model discloses a device that is used for heat supply unit low pressure cylinder to have steam operation, which comprises a boiler, the high pressure cylinder, the intermediate pressure cylinder, the low pressure cylinder, condensing equipment, the generator, set up first shutoff valve on the steam guide connecting pipe between intermediate pressure cylinder and low pressure cylinder, set up the steam extraction pipeline between intermediate pressure cylinder exhaust pipe and first shutoff valve, set up second shutoff valve on this steam extraction pipeline, realize the unit and switch to external steam extraction, set up low pressure cylinder entry manometer and low pressure cylinder entry thermometer between low pressure cylinder and first shutoff valve, be provided with low pressure cylinder outlet pressure table and low pressure cylinder outlet thermometer between low pressure cylinder export and condensing equipment. The utility model discloses can reduce unit generated power, increase heating area reduces the electricity generation coal consumption, improves hot economic nature.
Description
Technical Field
The utility model relates to a heat supply unit's of thermal power plant energy-conserving field, concretely relates to a device that is used for heat supply unit low pressure jar to have steam operation.
Background
With the increase of installed capacity of thermal power, the power generation capacity is seriously excessive, the average load rate of the units is low, however, the thermal power units in the three north area have a heat supply task, and the power generation mode of 'fixing power with heat' further restricts the load adjustment range of the heat supply units, limits the online power generation of new energy such as wind power, photovoltaic and the like, and causes the waste of the overall social resources and the increase of energy consumption to some extent.
In order to relieve the actual conditions of unbalance and mismatching of heat supply and power generation of the thermal power generating unit, the heat supply unit needs to solve the coupling problem of heat supply and power generation, the problem that the power generation load is not increased while the heat supply load is increased is thoroughly solved, or the problem that thermoelectricity is not mutually restricted is solved.
At present, in a heat supply unit, the minimum load of the unit needs to be adjusted according to the heat load demand of external heat supply in a heating season, external heat supply is ensured, the power generation load can only be adjusted between the minimum load of heat supply and the maximum output of the unit, the power generation load is often limited by factors such as water supplement of the unit, output of a boiler and the like, the adjustment range of the power generation load is narrow, and the requirement of power grid scheduling cannot be met.
The back pressure unit can realize higher thermoelectric ratio, reduces the power supply coal consumption of the unit, improves the economy of the thermal power plant, improves the external heat supply capacity of the thermal power unit, and increases the heat supply area. The pure condensing unit is changed into the backpressure unit, or the steam extraction heat supply unit is changed into the backpressure unit, so that the method has great practical significance, the potential of the equipment of the existing unit can be fully exerted, and the combined heat and power supply is realized.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a device that is used for heat supply unit low pressure cylinder to have steam operation to solve the heat supply unit and become the backpressure machine operation, increase external heat supply load and improve the technological problem of unit thermal efficiency, realize that the unit keeps the unchangeable purpose of external heat supply ability when reducing the electric load, to the electric wire netting dispatch, the heat supply unit can reduce minimum technique in the heating season and exert oneself, participates in the degree of depth peak regulation, satisfies the requirement that the flexibility was adjusted.
In order to realize the aim, the device for the steam-free operation of the low pressure cylinder of the heat supply unit comprises a boiler, a high pressure cylinder, a medium pressure cylinder, the low pressure cylinder, a condensing device and a generator, wherein a first shutoff valve is arranged on a steam guide connecting pipe between the medium pressure cylinder and the low pressure cylinder, a steam extraction pipeline is arranged between a steam exhaust pipe of the medium pressure cylinder and the first shutoff valve, and a second shutoff valve is arranged on the steam extraction pipeline to realize the external steam extraction switching of the unit.
Further, a low-pressure cylinder inlet pressure gauge and a low-pressure cylinder inlet temperature gauge are arranged between the low-pressure cylinder and the first shut-off valve and used for monitoring low-pressure cylinder inlet steam parameters when the low-pressure cylinder does not have steam operation and judging whether the first shut-off valve generates steam leakage or not.
And furthermore, the low-pressure cylinder is connected with a condensing device, and a low-pressure cylinder outlet pressure gauge and a low-pressure cylinder outlet temperature gauge are arranged between the outlet of the low-pressure cylinder and the condensing device and used for monitoring the parameters of the low-pressure cylinder exhaust steam and judging the vacuum tightness of the heat supply unit and whether the low-pressure cylinder has steam flow.
Further, the condensing device is connected with a vacuum pump.
The utility model discloses the technical scheme who adopts has following several aspect advantages: 1) the existence of steam in the low-pressure cylinder is realized by arranging a shut-off valve on the middle and low-pressure communicating pipe; 2) when the shut-off valve is closed, the low-pressure cylinder operates without steam, and the unit enters a back pressure operation mode; 3) the low-pressure cylinder of the heat supply unit operates without steam, so that the external heat supply capacity can be increased, the power supply coal consumption of the unit is reduced, and the operation economy is improved; 4) monitoring the vacuum tightness of the unit and the existence of steam circulation in the low-pressure cylinder by using pressure and temperature measuring points arranged at the inlet and the outlet of the low-pressure cylinder; 5) this neotype low pressure jar does not have steam operation device not only is applicable to old heat supply unit transformation, also is applicable to pure unit transformation for backpressure operation unit that congeals.
Drawings
The drawings are only intended to illustrate and explain the present invention and do not limit the scope of the invention. Wherein:
FIG. 1 is a schematic view of a steam-free operation device of a low pressure cylinder of a heat supply unit according to the present invention;
description of reference numerals:
1. a boiler; 2. a high pressure cylinder; 3. an intermediate pressure cylinder; 4. a low pressure cylinder; 5. a generator; 6. a vacuum pump; 7. a condensing unit; 8. a first shut-off valve; 9. a second shutoff valve; 10. a low pressure cylinder inlet pressure gauge; 11. a low pressure cylinder inlet temperature gauge; 12. a low pressure cylinder outlet pressure gauge; 13. low pressure cylinder outlet temperature gauge.
Detailed Description
It should be noted that the embodiments and technical features thereof may be combined with each other in the case where there is no conflict. The present invention will be further described with reference to the accompanying drawings and examples.
As shown in fig. 1, the high-temperature and high-pressure superheated steam generated by a boiler 1 firstly enters a high-pressure cylinder 2 of a steam turbine to perform expansion work, and then enters the boiler 1 again to absorb heat, and then becomes high-temperature and low-pressure superheated steam to enter a medium-pressure cylinder 3 of the steam turbine, a first shut-off valve 8 is arranged on a steam guide connecting pipe between the medium-pressure cylinder 3 and a low-pressure cylinder 4, a steam extraction pipeline is arranged between a steam exhaust pipe of the medium-pressure cylinder 3 and the first shut-off valve 8, and a second shut-off valve 9 is arranged on the steam extraction pipeline, so that the external steam extraction switching.
And a low-pressure cylinder inlet pressure gauge 10 and a low-pressure cylinder inlet temperature gauge 11 are arranged between the low-pressure cylinder 4 and the first shut-off valve 8 and used for monitoring low-pressure cylinder inlet steam parameters when the low-pressure cylinder does not operate in a steam running mode and judging whether the first shut-off valve 8 leaks steam or not.
And a low-pressure cylinder outlet pressure gauge 12 and a low-pressure cylinder outlet temperature gauge 13 are arranged between the outlet of the low-pressure cylinder 4 and the condensing device 7 and used for monitoring the parameters of the exhausted steam of the low-pressure cylinder 4 and judging whether the vacuum tightness of the heat supply unit and the low-pressure cylinder have steam flow.
The low-pressure cylinder 4 is connected with a condensing device 7, and the vacuum in the condensing device 7, the low-pressure cylinder and related pipelines is maintained through a vacuum pump 6.
The utility model discloses a heat supply unit low pressure jar does not have steam operation device's working process as follows: when the heat supply unit needs to reduce the power generation load and improve the external heat supply capacity, the low-pressure steam flow entering the low-pressure cylinder is cut off by closing the first shut-off valve and opening the second shut-off valve, all the exhaust steam of the medium-pressure cylinder is led out for external heat supply, the low-pressure cylinder of the heat supply unit operates without steam, and the unit condensing operation mode is converted into the back-pressure unit mode. Whether the first shut-off valve is tight is monitored through low-pressure cylinder inlet pressure and low-pressure cylinder inlet temperature measuring points, whether steam circulates in the low-pressure cylinder and whether a friction blast effect occurs is monitored through the low-pressure cylinder outlet pressure and low-pressure cylinder outlet temperature measuring points, and meanwhile, the method is also used for monitoring whether the operation of a condensing device and a vacuum pump of the unit is reasonable. After the first shut-off valve is closed, no steam flows in the low-pressure cylinder, the low-pressure cylinder runs in a high vacuum state, and unpredictable accidents such as overheating and friction cannot occur.
The utility model is suitable for a newly-built heat supply unit also is applicable to and reforms transform heat supply unit, also is applicable to the pure unit and reforms transform heat supply unit engineering, and the thought and the work theory that its low pressure jar of core does not have steam operation device lie in the low pressure jar and do not have the steam circulation, can not take place blast air, blade tremble and overheated etc. and endanger low pressure jar potential safety hazard, can realize that heat supply unit improves the degree of depth peak shaving and enlarges the dual ability of external heat supply.
The embodiments in the above embodiments can be further combined or replaced, and the embodiments are only described in the preferred embodiments of the present invention, which are not limited to the concept and scope of the present invention, and without departing from the design concept of the present invention, various changes and improvements made by the technical solutions of the present invention by those skilled in the art all belong to the protection scope of the present invention.
Claims (4)
1. The utility model provides a device that is used for heat supply unit low pressure cylinder to have steam operation, includes boiler (1), high-pressure cylinder (2), intermediate pressure cylinder (3), low pressure cylinder (4), condensing equipment (7), vacuum pump (6), generator (5), its characterized in that: set up first shut-off valve (8) on leading vapour connecting pipe between intermediate pressure jar (3) and low pressure jar (4), set up the steam extraction pipeline between intermediate pressure jar (3) steam extraction pipe and first shut-off valve (8), set up second shut-off valve (9) on this steam extraction pipeline, realize the unit and externally extract the vapour and switch.
2. A device for heating unit low pressure cylinder steam-free operation according to claim 1, characterized in that: a low-pressure cylinder inlet pressure gauge (10) and a low-pressure cylinder inlet thermometer (11) are arranged between the low-pressure cylinder (4) and the first shut-off valve (8) and used for monitoring low-pressure cylinder inlet steam parameters when the low-pressure cylinder does not have steam operation and judging whether the first shut-off valve (8) generates steam leakage or not.
3. A device for heating unit low pressure cylinder steam-free operation according to claim 1, characterized in that: the low-pressure cylinder (4) is connected with the condensing device (7), and a low-pressure cylinder outlet pressure gauge (12) and a low-pressure cylinder outlet thermometer (13) are arranged between the outlet of the low-pressure cylinder (4) and the condensing device (7) and used for monitoring the steam exhaust parameters of the low-pressure cylinder (4) and judging whether the vacuum tightness of the heat supply unit and the low-pressure cylinder have steam flow.
4. A device for heating unit low pressure cylinder steam-free operation according to claim 1, characterized in that: the condensing device (7) is connected with a vacuum pump (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920288185.9U CN210217848U (en) | 2019-03-07 | 2019-03-07 | Device for steam-free operation of low-pressure cylinder of heat supply unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920288185.9U CN210217848U (en) | 2019-03-07 | 2019-03-07 | Device for steam-free operation of low-pressure cylinder of heat supply unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210217848U true CN210217848U (en) | 2020-03-31 |
Family
ID=69915858
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920288185.9U Active CN210217848U (en) | 2019-03-07 | 2019-03-07 | Device for steam-free operation of low-pressure cylinder of heat supply unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210217848U (en) |
-
2019
- 2019-03-07 CN CN201920288185.9U patent/CN210217848U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108343479B (en) | Two-unit-based back condensation and extraction heat supply system and adjusting method | |
| CN108049923B (en) | Three-exhaust 200MW unit medium-low pressure cylinder combined zero-output heat supply system and method | |
| CN106838865B (en) | Completely thermoelectric decoupling steam extraction and heat supply power station system and working method | |
| CN107905858B (en) | Final stage safety flow monitoring and controlling system and method | |
| CN107178398B (en) | Thermoelectric decoupling system for improving energy utilization quality of thermal power plant | |
| CN212054840U (en) | Shutdown non-shutdown system based on molten salt heat storage | |
| CN108468575B (en) | System for changing extraction condensing unit into back pressure unit based on injection heat pump and operation method thereof | |
| CN105298555B (en) | Pure condensate-high back pressure circulating water heating double mode single rotor steam turbine and its system | |
| CN201826901U (en) | Reheat type back pressure steam turbine | |
| CN211174242U (en) | Heating season cogeneration unit on-line electricity load adjusting system | |
| CN210483828U (en) | Energy-saving power generation and utilization system utilizing exhaust steam waste heat of steam turbine of thermal power plant | |
| CN210179723U (en) | Combined cycle device based on heat supply and electric power peak regulation coupling | |
| CN210088955U (en) | Combined cycle device for steam extraction integration and heat storage peak regulation coupling | |
| CN110700909A (en) | Heating season cogeneration unit on-line electricity load adjusting system and adjusting method | |
| CN210217848U (en) | Device for steam-free operation of low-pressure cylinder of heat supply unit | |
| CN217950479U (en) | Power plant cylinder cutting system capable of reducing steam consumption of cooling steam | |
| CN216554044U (en) | 600MW unit steam-heat output integrated device | |
| CN213630639U (en) | Exhaust waste heat utilization system of cooling air heat exchanger of hot channel of gas turbine | |
| CN105698241B (en) | A kind of method of 150MW high back pressures thermal power plant unit circulation pump of heat-supply network operation | |
| CN212565993U (en) | Heat supply operation system for prolonging service life of safety valve | |
| CN210195827U (en) | Low-pressure cylinder cooling device for backpressure-improved steam turbine | |
| CN210178429U (en) | Heating system for steam extraction integration of gas-steam combined cycle unit | |
| CN210087417U (en) | Thermoelectric unit cuts off low pressure jar steam admission coupling heat pump step heating system | |
| CN113483320A (en) | Ash water low flash steam recycling system | |
| CN207813674U (en) | For the solidifying condensate system for taking out back of the body heat supply |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |